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Crotchety Old Bastard
 
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Building a Better Beer Can: Turbo Oil Sump Tank

You can't work with 930 exhaust systems without running into the aftermarket turbo oil sump tank. Most are just metal beer cans with a spigot and drain hose. Adequate yes, optimal no. As I ran across different turbos and turbo installation configurations I noted what would be needed to make them function better. Things such as:

- Vent. OEM's all have vents, great thing to have if some malfunction backs up the oil. If it can't leave the catch can it's going to blow through your turbo seals.
- Drain. It would be nice to be able to drain the tank without removing the return line.
- Aux Hose to Engine. Aftermarket turbos have different oiling needs than the OEM's so you may want the option of draining to the bottom of the engine.

So we combined all of these options, and more, into one fancy metal beer can with lots of spigots. You can attach the vent to the OEM hose, plug it off, vent to atmosphere, drain by unscrewing a plug or add an aux. hose to that same plug.

Now is where I need your help, pricing this little dude. I plan to offer these with my headers but will make extra for Pelican as a stand alone if there is interest and folks are willing to cover my costs plus a six pack.

Tank


Extra Fittings Capped


Barb Attach to OEM Vent Hose


Vent to Atmosphere and Aux Hose
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-30-2011, 06:06 PM
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Metal Guru
 
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Brian, looks nice and useful.
When I drain mine after an extended shutdown, it contains 7 oz. of oil (capacity is 8 oz.). I've often thought that switching to a ball bearing turbo would cut the required sump size by 50% or even more.
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 06-30-2011, 06:52 PM
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Pricing, I don't know, but it looks really nice.

About the six pack. If you ever head south. I have one waiting - Nice and cool.
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Jesper
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Old 06-30-2011, 07:33 PM
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Bri:

You always make all this neat s--- AFTER I have purchased something else.

Did you get your tin OK ?


Cole
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Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 06-30-2011, 07:39 PM
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Crotchety Old Bastard
 
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Ha ha, no it just takes a loooong time to bring these projects to fruition. We've got several things that are ready to hit, including the revised heat exchangers amd a little something for the 965 guys.

Paul, I've got to test out that ambient air vent using my car to see if the oil ever fills the can. In theory it should never get close unless there is a problem. What I was thinking when I added this breather gizmo was that it is very simple, eleminates the vent hose (which is a PITA to remove) and you can see real easy if the tank overflows. The system has to work better with pressure releived.

Jesper, I need a vacation real bad and we're thinking about heading south before the kids go back to school. May take you up on that beer!

Cole, yes I received the tin but haven't had time to unbox it yet. I'm building my next mule engine for a new twin turbo project. This one will blow your mind! Call me tomorrow when you get a chance I need to talk to you about the size of that flange, it looks too big to me.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-30-2011, 07:58 PM
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Quote:
Originally Posted by cole930 View Post
You always make all this neat s--- AFTER I have purchased something else.
***^THIS^***

literally by a coupla weeks - d'oeth!

8-)

ah well...

Feedback? Looks TITS!
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Last edited by krasuskyp; 07-01-2011 at 04:46 AM..
Old 06-30-2011, 08:31 PM
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Turbofrog
 
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Looks very functional.

Any drawback venting the breather to the oiltank breather? Not sure in what conditions the oil tank would let oil out of the breather?

What if the pressure valves fail (resulting too much pressure and oil flow) and your filter possibly spools the exess oil on the road? Mine does not have the oil tank breather line so I'm in the same boat so is it really critical? Just rambling...
Old 07-01-2011, 12:44 AM
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Crotchety Old Bastard
 
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Quote:
What if the pressure valves fail (resulting too much pressure and oil flow) and your filter possibly spools the excess oil on the road?
That is exactly why I have it as an option. The OEM tank allows extra oil to puke back into the air breather assembly making a huge mess in your engine. Your first clue that this has happened is a huge smoke screen behind you and/or a locked up turbo. This tiny breather would allow the oil to flow out of the tank and onto the road, hopefully to be easily seen by you or others so you stop quickly.
If the tank is not vented pressure would back the oil up through the turbo seals costing you $$$.
It's an option. Use it as a breather, use the barb fitting and connect the OEM hose to air filter box, or cap that bung off.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8

Last edited by RarlyL8; 07-01-2011 at 04:13 AM..
Old 07-01-2011, 04:10 AM
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similar

I did the same thing on my old ride... the extra hole was just in case too much oil was getting in the can and the scavenge pump couldn't keep up.

Here is a shot. Looks nice Brian.

Regards,
Bryan



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Old 07-01-2011, 06:03 AM
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Brian,
That's a good idea adding fittings. One thing I would change is I would not use a vent fittings directly on the tank. This filtered fitting will be directly subjected to debris (would get dirty fast) and rain (would introduce water to oil system). Suggest to add a vent line and route it higher into the engine bay using a clear fuel filter and route it back down to the ground. That way if there's any problem with turbo oil pumped/drained from the sump tank it would overflow without pressurizing the turbo seals. This is what I did on my 930.
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Old 07-01-2011, 06:05 AM
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Crotchety Old Bastard
 
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That's what I had in mind as well, thanks for posting a picture!

Mike, yes you can do that too with the barbed fitting I have on the picture above. Options ...
The little vent/filter is brass mesh. Very tight so no water should get it.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8

Last edited by RarlyL8; 07-01-2011 at 06:11 AM..
Old 07-01-2011, 06:07 AM
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When testing the sintered brass vent to atmosphere on the sump tank for leaks after shutdown be sure to try that with the car parked uphill. Sometimes you have to park on an uphill slope in a driveway, parking lot, or streetside and it's possible that sump tank may fill up with more hot oil than on level ground and overflow out.

Also it's very likely and possible there are times at lower speeds the scavange pump will be sucking more volume than the amount of oil draining from the turbo will supply to it and there will be a good vacuum in the turbo sump tank from the scavange pumps suction.
My scavange pump has very high suction and vacuum even at idle speed - I know I've checked that with the hose in a cup of oil to check it and with my finger on the AN hose fitting at idle and the suction felt extreme.

In that situation if the sump tank has vacuum in it from the scavange pump the optional sintered brass air vent you have on there will be allowing outside unfiltered air to be sucked into the sump tank and engine oil.
In heavy rainy weather do to it's location inches from the road that can also suck dirty water into your oil supply.
Old 07-01-2011, 08:34 AM
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Crotchety Old Bastard
 
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Duly noted. The little brass dude probably does as good a filtering job as most K&N's, ha!
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-01-2011, 09:42 AM
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sudo apt-get purge 930
 
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Did you come up with a price on this? I'll be needing one soon.
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

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Old 07-08-2011, 05:51 AM
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Crotchety Old Bastard
 
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I'll sell the first run at cost which is less than $200 and includes everything seen in the pictures (only 1 oil line though).
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-08-2011, 06:00 AM
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Brian count me in for one. with the one hose and all the fittings. As far as the beer I will credit you the amount as shipping it might be a hassel.
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Old 07-08-2011, 02:11 PM
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Crotchety Old Bastard
 
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I had to order the 90* (how do you make the degree sign?) vent elbow as my local hose/fitting shop does not stock them. Hope to have all the accessories together in about a week.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-08-2011, 06:09 PM
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Brian,

I think that's a reasonable price considering your time and sourcing all the little correct parts and sizing everything. We (Jpnovak and I) are getting close to getting our HFS turbo/efi/edis project into the car in the near future and Jamie noted the stock catch can wouldn't fit around the 993 HE's, M&K y pipe. If we can't simply swap one catch can (beer can) from the 78 930 to the 84 Narrow body turbo catch can I will be in the market for one and $200 is about what I would expect to pay before attempting myself. Do you have one ready to go?

John
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Old 07-09-2011, 03:19 AM
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sudo apt-get purge 930
 
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Payment sent Brian.
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 07-09-2011, 03:28 AM
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Alt 0176 should give you the degree symbol.
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Jeremy C.
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Old 07-09-2011, 04:08 AM
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